21. What is a Node.js module?
22. Which built-in Node.js module provides functions for working with file systems?
23. How do you include a module in a Node.js file?
Answer:By using the require function
24. What is the purpose of the Node Package Manager (npm)?
25. What is the default location where globally installed npm packages are stored?
26. Which npm command is used to install a package locally in a Node.js project?
27. What is the purpose of the package.json file in a Node.js project?
Answer:To specify project metadata, dependencies, and scripts
28. How can you run a script defined in the package.json file using npm?
Answer:By using the npm run command followed by the script's name
29. What is a common use case for npm scripts in a Node.js project?
Answer:Running unit tests, build processes, or application start scripts
30. What does the npm install --save command do when installing a package?
Answer:It installs the package as a production dependency in the package.json file.
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